| Rossmoor to Orbetello | 6,270.40 mi (10,091.23 km) |
| Rossmoor to Oria | 6,580.02 mi (10,589.53 km) |
| Rossmoor to Oristano | 6,313.34 mi (10,160.34 km) |
| Rossmoor to Orta Nova | 6,474.36 mi (10,419.48 km) |
| Rossmoor to Orte | 6,307.45 mi (10,150.86 km) |
| Rossmoor to Ortona | 6,377.42 mi (10,263.47 km) |
| Rossmoor to Orvieto | 6,284.77 mi (10,114.36 km) |
| Rossmoor to Orzinuovi | 6,073.48 mi (9,774.32 km) |
| Rossmoor to Osimo | 6,287.19 mi (10,118.26 km) |
| Rossmoor to Ospitaletto | 6,069.81 mi (9,768.41 km) |
| Rossmoor to Ostuni | 6,565.40 mi (10,565.99 km) |
| Rossmoor to Ottaviano | 6,461.73 mi (10,399.15 km) |
| Rossmoor to Ovada | 6,071.39 mi (9,770.95 km) |
| Rossmoor to Ozieri | 6,292.73 mi (10,127.18 km) |
| Rossmoor to Paceco | 6,552.51 mi (10,545.25 km) |
